Full Charge Capacity Dropping on Coconut Battery

Discussion in 'MacBook Pro' started by hj576, Jan 2, 2017.

  1. hj576 macrumors regular

    hj576

    Joined:
    Oct 31, 2016
    Location:
    Netherlands
    #1
    So I got my Macbook Pro 13 inch without touchbar on 15th November 2016. Everything was great and I am getting great battery life
    But Recently, Every time I open coconut Battery it seems like my full charge capacity has dropped a few 10th of a percentage.
    at the moment its at 96.6%, it was 97% last night.
    I saw this in start as well where the Full Charge capacity went down below 100% but after keeping it plugged in for a while it went back up.
    Last night I had it plugged in for a good 5-6 hours yet the Full Charge Capacity did not go above 97%, and now its even further down.
    Should I be worried about this? Or is coconut battery just not calibrated correctly, Since I am getting great battery life (though 3% should not really cause a significant drop)
    My charge cycles are just 12 so far.

    Any help would be great

    I have attached some images from Coconut Battery for reference as well

    Screen Shot 2017-01-02 at 11.05.40 AM.png Screen Shot 2017-01-02 at 11.05.48 AM.png Screen Shot 2017-01-02 at 11.05.58 AM.png Screen Shot 2017-01-02 at 11.06.16 AM.png
    --- Post Merged, Jan 2, 2017 ---
    And right after posting this the Full Charge went up a bit.....
    Is there a way to recalibrate it ?
    Screen Shot 2017-01-02 at 11.12.53 AM.png
     
  2. SoyCapitanSoyCapitan macrumors 68040

    SoyCapitanSoyCapitan

    Joined:
    Jul 4, 2015
    #2
    Every calculation in cases like these have a few percent margin of error.
     
  3. Fzang macrumors 65816

    Fzang

    Joined:
    Jun 15, 2013
    #3
    Sounds like OCD. Stop looking at coconutBattery every five minutes. If it has dropped significantly within a few months it'll show, and that should be covered by the warranty as a manufacturing defect.
     
  4. hj576 thread starter macrumors regular

    hj576

    Joined:
    Oct 31, 2016
    Location:
    Netherlands
    #4
    not OCD :p fear of hard earned cash going down the drain

    As i said i wasnt worried when it dropped to 99.5 or 99%
    but 3 percent in a month (since it was at 100% in Start of December )kinda scared me
     
  5. idark77 macrumors 6502

    idark77

    Joined:
    Dec 2, 2014
    #5
    ...~3% with 12 cycle count is not good...
     
  6. hj576 thread starter macrumors regular

    hj576

    Joined:
    Oct 31, 2016
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    Netherlands
    #6
    thats what worries me, hopefully its just miscalculation on part of coconut battery
    it did show 102% of full charge capacity when the laptop was new :p
     
  7. Weaselboy Moderator

    Weaselboy

    Staff Member

    Joined:
    Jan 23, 2005
    Location:
    California
    #7
    Coconut battery is spot on accurate.

    You have nothing to worry about here and what you are seeing is normal. That capacity number will fluctuate up and down a little over time.
     
  8. SoyCapitanSoyCapitan macrumors 68040

    SoyCapitanSoyCapitan

    Joined:
    Jul 4, 2015
    #8
    I ran Geekbench yesterday. Ran it again today. 2% slower. Whyyyyyy!!!???

    #marginoferror #softwareisntlawsofphysics
     
  9. MrGuder macrumors 68020

    Joined:
    Nov 30, 2012
    #9
    Can someone tell me which is my manufacture date of my MacBook Pro. When I look at coconut battery the top say one date but at the bottom there is another manufacture date with another date which is the top date the date you ordered and the bottom date the date they made the laptop?
     
  10. hj576 thread starter macrumors regular

    hj576

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    Oct 31, 2016
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    Netherlands
    #10
    one is the manufacturing date of your laptop
    and one is for your battery
     
  11. evec macrumors regular

    Joined:
    Jun 8, 2016
    #11
    Coconut battery just enquire the system to get those information.

    The battery is normally and it should degrade when you start to use this.
    Also, battery will faster degrade in initially period.
    As battery tend to reduce the capacity on temperature low, so it should be normal.

    Also, don't need recalibrate the battery because Apple nowadays use advantage IC will continuous adjust of reading and no need calibrate.
     
  12. hj576 thread starter macrumors regular

    hj576

    Joined:
    Oct 31, 2016
    Location:
    Netherlands
    #12
    A thing i noticed was, I am from Pakistan studying in Amsterdam, I bought this laptop here in Amsterdam and for the first month used it in Amsterdam and saw no drop in performance of battery.
    I visited Pakistan at end of December for 15 days, during this time i saw in drop in percentage. Pakistan is famous for its sub standard electricity supply which fluctuates and the voltage is not stable at 220 and usually is a few volts down.
    During these 15 days I would see full capacity drop ever day by 0.1-0.2%
    I have been back in Amsterdam for 2 weeks now and again the battery percentage is stable and actually has gone up a few tenth of a percentage.

    It might have just been substandard quality of voltage control that caused the problem? it is famous that battery life of devices is usually lower when used in Pakistan...

    or i am just thinking too much into this thing xD
     
  13. MrGuder macrumors 68020

    Joined:
    Nov 30, 2012
    #13
    Is there anyway to determine how many hrs your battery lasts within 1 full charge. I know activity monitor tells you how much battery is left but when you exit that app it all goes back to zero. I charged it yesterday to 100% and today I have 41% left on my battery but I have no way of knowing how many hours I have run my laptop since 100%, do I have to count it manually? I guestimate I've been on it for about 4 hrs so far. I don't see where coconut battery tells you how many hrs you have been using since full charge, only how much battery you have left.
     
  14. MrGuder macrumors 68020

    Joined:
    Nov 30, 2012
    #14
    Sorry still trying to learn here. I noticed tonight that activity monitor does actually show you how much time is on your battery.
     
  15. Supra Mac macrumors regular

    Joined:
    Jan 5, 2012
    Location:
    Texas
    #15
    You can search the MacBook forum and see that this has happened before on the 12 inch, they were getting exchanges under 90% on a relatively new machine. I'm at 96%, but never started over 97% on nTB with 12 cycles. I wouldn't be concerned about it just yet.
     
  16. dazultra, Jan 11, 2017
    Last edited: Jan 11, 2017

    dazultra macrumors newbie

    dazultra

    Joined:
    Jan 11, 2017
    #16
    Is there something wrong with my 13" toucher?? 4300 battery capacity . 12 cycles!! :(

    Mines on the right. Looks as Low as old gold ultra thin MacBook.

    Why the hell is this thing so heavy, with minuscule battery inside? Some one laughed at me and said there phone has more capacity than my MacBook Pro
     

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  17. trfjason macrumors member

    Joined:
    May 28, 2010
    #17
    Your battery seems normal to me.
     
  18. JackieInCo macrumors 601

    Joined:
    Jul 18, 2013
    Location:
    Colorado
    #18
    I'm not sure what Apple has done with the recent batteries on MBPs.

    My 2015 15" has 15 cycles, 93.3% capacity. I bought it a year ago in June.
    My 2012 13" non retina MBP has 12 cycles, 93.9% capacity and i Bought it too a year ago in June, both computers brand new at BestBuy.
     
  19. Weaselboy Moderator

    Weaselboy

    Staff Member

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    Location:
    California
    #19
    That is totally normal and there is nothing wrong.
     
  20. JackieInCo macrumors 601

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    Jul 18, 2013
    Location:
    Colorado
    #20
    The magsafe connector got yanked out of my 15" 2015 MBP while I was sleeping last night and I only discovered it when I opened the lid and it told me it would shut down soon due to low battery. I have 16 cycles now and the capacity reads 93.8 and before this cycle, it was 93.3. It seems to have stabilized a bit over the last 5-6 cycles.
     
  21. sojers92 macrumors newbie

    Joined:
    Dec 18, 2016
    #21
    Is not about how big you have it, but how you use it (cit.). Jokes aside, battery size only matters relatively.

    How come that you have such small number of cycles? I have 1300 cycles on my 2012 machine and still 88% of capacity
     
  22. JackieInCo macrumors 601

    Joined:
    Jul 18, 2013
    Location:
    Colorado
    #22
    I bought my 2012 brand new a year ago in July. I don't really have a need to bring it or my 2015 MBP anywhere with me so they sit at home. I only use them on battery power over a month so the battery gets used occasionally.
     
  23. jerryk macrumors 68030

    Joined:
    Nov 3, 2011
    Location:
    SF Bay Area
    #23
    I would not accept that. Computers are deterministic in behavior. There is a reason. If we spend enough time analyzing the results of the individual tests, I bet one can find exactly that changed, and then determine why it changed.
     
  24. leman macrumors 604

    Joined:
    Oct 14, 2008
    #24
    And thats why people shouldn't use these tools. You can always find problem if you look. Diagnostics tools start making sense when your computer starts exhibiting problems, so that you can narrow it down. And yes, it is possible to predict problems, but that calls for much more complex models and approaches.

    You wish :D Ever done multicore programming?

    There is always a reason. Most of the time, it makes much more sense to sweep that reason into the normal error term. Otherwise you will end up with reasons like "my dog has farted and it increased the room temperature by 0.01 degree and the CPU was able to maintain its max clock for 0.001sec slower".
     
  25. Newtons Apple macrumors P6

    Newtons Apple

    Joined:
    Mar 12, 2014
    Location:
    Jacksonville, Florida
    #25
    Then return it and see if you can get a refund because your battery IS going to show wear. The battery testing apps are not the best. Wait a week and test again.
     

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